#include <stdio.h>

void f(int *arr)
{
    printf("%d", (int)sizeof(arr));
}
int main()
{
    int arr[] = {1, 2, 3, 4, 5};
    int length = sizeof(arr) / sizeof(arr[0]);
    printf("Hello, World!\n");
    printf("%d", length);
    f(arr);
    return 0;
}